import { MatchSpec } from "../match";
import Message from "../message";
import * as pubsub from "../pubsub";
import Hub from "../hub";
export interface TopicStoreOptions {
    pattern?: string | string[];
    persistent?: boolean;
}
/**
 * Remember last message for each topic.
 *
 * A new message with the same topic will overwrite the last message with that
 * topic, unless the `data` part of the message is `undefined`, in which case
 * the message is deleted from memory.
 *
 * When a new Destination binds to this, all currently remembered topics are
 * sent to it.
 */
export declare class TopicStore extends pubsub.BaseSource implements pubsub.Initializable {
    name: string;
    private _state;
    private _matcher;
    private _storage;
    private _options;
    constructor(name: string, options?: TopicStoreOptions);
    init(hub: Hub): Promise<void>;
    send(message: Message): void;
    bind(destination: pubsub.Destination, pattern?: MatchSpec): void;
}
export default TopicStore;